What is the difference between high-speed punch molds and ordinary punch molds?

Both punches and molds have different precisions, and the price will naturally be different depending on the precision. A good horse goes with a good saddle, and it is also suitable for use in molds and punching machines.

Differences in punch presses: Ordinary punch presses have a simple bed structure, insufficient rigidity, and poor parallelism of the worktable. Mostly used with single-punch molds or molds with low product accuracy. The ordinary price is estimated to be several thousand dollars cheaper.

The high-speed punch machine bed has a complex structure, is solid, and has sufficient rigidity. The parallelism of the workbench is 0.005MM. It is currently a relatively high-end punch press with a parallelism of 0.02MM. It is slightly worse and the price is hundreds of thousands. Most of the punch machines imported from Japan cost more than one million, and those from Switzerland cost more than 2 million. The accuracy is not a matter of slight differences.

What you are asking about is the mold. Let’s focus on the mold. The most important part of the mold is the guide pillar. Its guiding accuracy determines whether the correspondence between the upper and lower mold parts of the mold is accurate. The molds of ordinary punch machines generally have low product accuracy, so the accuracy of mold parts will be much lower, and guide parts will naturally also be lower. For example, guide posts use round guide posts and round guide bushes, which are round surface fits, but they are clearances. According to different specifications, the single-side clearance is about 0.01mm-0.03mm; and the high-speed punch molds mainly have relatively high product precision, large quantities, and long production cycles. In order to facilitate maintenance, the mold accuracy naturally needs to be improved a lot, and the comprehensiveness To improve the accuracy, the most important thing is of course the guide part. The precision mold guide part has both inner guide posts and outer guide posts. Currently, the inner and outer guide posts of high-speed punching molds are made of guide posts, guide sleeves, and ball sleeves. The gap is a rolling interference fit. The accuracy and position of the upper and lower mold parts can be controlled at 0.002-0.005mm. The accuracy of the processed stamping parts can be guaranteed to be -0.01 to -0.02.

Differences in templates: different materials. Ordinary molds even use our common ordinary steel plates. Most precision molds currently use imported SKD11 materials. The accuracy and thickness control of template processing vary greatly. Precision mold plates The parallelism and flatness are required to be controlled at 0.002-0.005mm. If the ordinary ones can reach 0.02mm, it is very good. The heat treatment methods are also different. Precision molds are currently commonly used for cryogenic treatment or even ultra-cryogenic treatment to eliminate processing stress and make the template more stable and non-deformable.

The processing and materials of parts are different. Ordinary parts are mostly processed by fast wire, with an accuracy of plus or minus 0.02, and large roughness; precision parts are processed by slow wire, with an accuracy of plus or minus 0.005. In terms of materials, precision In order to make the mold parts more durable, tungsten steel is used as the parts, and their service life will be increased several times.

Precision molds can only show the advantages of precision molds driven by precision punches: fast speed, good stability, high precision, and easy maintenance. At present, the most common high speed is 1,000 strokes/minute. The mold size and production speed of different products will also vary. More than 200 strokes are common.

There are still many differences. Let’s talk about these for now. I hope it will be helpful for you to understand the differences of molds.